Kikai Island - Radiocarbon and Oxygen Isotope Data Morimoto, M.; Kitagawa, H.; Shibata, Y.; Kayanne, H. Morimoto, M. Kitagawa, H. Shibata, Y. Kayanne, H. earth science/paleoclimate/corals and sclerosponges (delta 18O,Porites sp.,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (age,null,null,year Common Era,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (Delta 14C,Porites sp.,null,per mil NBS oxalic acid,null,corals and sclerosponges,raw,accelerator mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Kikai Island>LATITUDE 28.28>LONGITUDE 129.93) A coral radiocarbon (D14C) investigation with a high time-resolution is crucial for reconstructing secular and seasonal D14C changes in the surface seawater, which potentially reflect ocean circulations and dynamic ocean-atmosphere interactions. The D14C values of a modern coral (Porites sp.) from Kikai Island, southern Japan, in the subtropical Northwestern Pacific, were determined for the period of 1991-1998 at a monthly resolution. A coral D14C time series for the 8 yr indicated seasonal cycles superimposed on a secular decreasing trend of 3.8 per mil.per yr. The seasonal amplitude of the coral D14C was about 18 per mil on the average, and minimum D14C was observed in late spring and summer. The D14C changes were tentatively explained by horizontal oceanic advections around Kikai Island or over the wide range of the equatorial and subequatorial Pacific. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Morimoto, M. Investigator : Kitagawa, H. Investigator : Shibata, Y. Investigator : Kayanne, H. 2004-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/1899 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/kikai2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/kikai2004.txt English https://www.ncdc.noaa.gov/paleo/study/1899 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/kikai2004.txt Morimoto, M., H. Kitagawa, Y. Shibata, and H. Kayanne. 2004. Seasonal radiocarbon variation of surface seawater recorded in a coral from Kikai Island, subtropical Northwestern Pacific. Radiocarbon 46(2):643-648. START YEAR: 1991 AD * END YEAR: 1998 AD 129.93 28.28 129.93 28.28